Linux - NewbieThis Linux forum is for members that are new to Linux.
Just starting out and have a question?
If it is not in the man pages or the how-to's this is the place!

Notices

Welcome to LinuxQuestions.org, a friendly and active Linux Community.

You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!

Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.

If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.

Having a problem logging in? Please visit this page to clear all LQ-related cookies.

Introduction to Linux - A Hands on Guide

This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.

what is the exact size of the ISO?? you probably just need to get yourself a 700MB cd to burn it on...

if for some reason you NEED to use your 640MB cd what you can do is mount the ISO, copy the contents to your hard drive, remove any files you don't want/need, and then re-create an ISO which fits on your cd using the stripped-down content...

well, i've burned ISOs that weigh more than 700MB onto 700MB cds... i think there might be some discrepency between the way we usually measure file sizes and the way the space on the cd is calculated, or perhaps cd manufacturers are known to include more media than is marked?? i don't know man, if i were you i'd just burn the image to a 700MB cd and see if the burn completes without errors, and then i'd do an MD5SUM check of all the files on the disk to make sure everything's perfect...

Originally posted by win32sux well, i've burned ISOs that weigh more than 700MB onto 700MB cds... i think there might be some discrepency between the way we usually measure file sizes and the way the space on the cd is calculated, or perhaps cd manufacturers are known to include more media than is marked?? i don't know man, if i were you i'd just burn the image to a 700MB cd and see if the burn completes without errors, and then i'd do an MD5SUM check of all the files on the disk to make sure everything's perfect...

So a 80min cd can contain 737,280,000 raw bytes. If you think that some of these are the ISO9660 stuff then you lose a
few mbs.

737,280,000 bytes / 1048576 bytes/mb = 703MB
Some people see the size of the iso in bytes and think "ah it is more than 700" but the size in MBs is not more than 700MB

now this is when using MODE1 cds (data cds)

A cd has 2352 bytes/sectors. 2048 are used for data and the other for error correction and other uses.
If you have a VCD for example or other (MODE1/RAW,MODE2,whatever) then it uses all the 2352 bytes/sector
so this translates to 846,720,000 bytes. that is why when you rip a vcd it is sometimes 800mb

So a 80min cd can contain 737,280,000 raw bytes. If you think that some of these are the ISO9660 stuff then you lose a
few mbs.

737,280,000 bytes / 1048576 bytes/mb = 703MB
Some people see the size of the iso in bytes and think "ah it is more than 700" but the size in MBs is not more than 700MB

now this is when using MODE1 cds (data cds)

A cd has 2352 bytes/sectors. 2048 are used for data and the other for error correction and other uses.
If you have a VCD for example or other (MODE1/RAW,MODE2,whatever) then it uses all the 2352 bytes/sector
so this translates to 846,720,000 bytes. that is why when you rip a vcd it is sometimes 800mb

I hope i helped and didn't confuse you

i know that cd sizes are pure math and stuff, but what would be the mathematical explanation for a "711MB ISO" (as posted above by willie883) fitting on a "700MB" cd?? i mean, let's say he goes ahead with the burn and the md5sum checks-out fine for all the files... if there's supposed to only be 703MB available and the image weighed 711mb then there should be some data loss, no?? if there isn't any data loss ("du" confirms the size and md5sum confirms the integrity of the files) then what exactly is going on??

Originally posted by win32sux i know that cd sizes are pure math and stuff, but what would be the mathematical explanation for a "711MB ISO" (as posted above by willie883) fitting on a "700MB" cd?? i mean, let's say he goes ahead with the burn and the md5sum checks-out fine for all the files... if there's supposed to only be 703MB available and the image weighed 711mb then there should be some data loss, no?? if there isn't any data loss ("du" confirms the size and md5sum confirms the integrity of the files) then what exactly is going on??

This is what imitheos meant. There is more than 700mb on a CD. Because the 700mb is just for the data. There is the "partition/format" overhead that is not counted.

Also, keep in mind files on disk take at least one block of data. Even if they dont fill the block completely. So Files are usally reported greater than they actually are (usaly a few Kb, but can up to a few Mb).

Originally posted by win32sux i know that cd sizes are pure math and stuff, but what would be the mathematical explanation for a "711MB ISO" (as posted above by willie883) fitting on a "700MB" cd?? i mean, let's say he goes ahead with the burn and the md5sum checks-out fine for all the files... if there's supposed to only be 703MB available and the image weighed 711mb then there should be some data loss, no?? if there isn't any data loss ("du" confirms the size and md5sum confirms the integrity of the files) then what exactly is going on??

The confusion comes from MB and MiB (large MB)
Some people say that they burnt 720MB on the cd and they mean 720,000,000 bytes which if you divide it with 1024*1024
is smaller than 700MB

Some people will say i burnt 668MB in a 650MB cd.
This is not true because this image is 668,659,712 bytes. If you divide this with 1024 you have 652,988KB and if you divide this
again with 1024 you have almost 638MB.

So this is smaller than 650MB.

I don't mention the different modes again because i mentioned them in my previous post and even there i gave very little
information, because i didn't want to confuse.

Originally posted by willie883 I know how to burn. using roxio. I downloaded the ISO's and the are over 700 mb. too large to burn to a cd. My standard CD's are 640 mb. I'm trying to install a new HD & OS.
Thanks,
Ed

Have you tried it? I have gotten iso's from bit torrent and other places that seem to large but when I burn the image all is well with the world....

I've attempted to burn them a couple of different times, the same results, too large. Tried drag and drop, creator classic, & disc copy. The CD's state they are 640. What I'm I missing? By the way thank for the math.

Originally posted by willie883 I've attempted to burn them a couple of different times, the same results, too large. Tried drag and drop, creator classic, & disc copy. The CD's state they are 640. What I'm I missing? By the way thank for the math.

You need to burn them as an image. I am not familiar with roxio. There is usually an option to create a cd from an image. At that point you select your iso and it burns from there. If you try burning these using the drag and drop or just burning the iso the cd will not boot as expected.

If roxio can't do it, know Nero can as well as Alcohol 120

EDIT: I checked the Roxio site. It does support iso's. You need to look for the selection to create a cd from an image.

Thank you for your response. I downloaded alcohol 120, launched the image burn wizard & for the CD it tells me the image is too large. Maybe I downloaded the wrong ISO. It is off of this site, Mandrakelinux-10.1-official-download-cd1.i586.iso is this right?

Originally posted by willie883 I've attempted to burn them a couple of different times, the same results, too large. Tried drag and drop, creator classic, & disc copy. The CD's state they are 640. What I'm I missing?